Trust Issues
To calculate degrees of freedom (df) for chi-square of goodness-of-fit, homogeneity, and association/independence is defined as (r-1)(c-1)=df
What is FALSE?
Can be used when two measurements generally are before and after a treatment intervention.
What is a Paired t-test?
Define Biostatistics?
Biostatistics is the application of the discipline of statistics to problems in Biology, Human Biology, and/or Public Health.
The study must be conducted in a proper manner,____________, and the null hypothesis must be rejected at p-value, "p" is less than or equal to 0.05.
What is appropriate statistics must be used?
What is the equation for Chi-Square?
What is (O/E)2/E?
Two-Way ANOVA shows the variance between groups and within groups while One-Way ANOVA assesses the interaction effects.
What is FALSE?:
Two-Way ANOVA assesses the interaction effects.
One-Way ANOVA shows the variance between groups and within the groups.
Can be used to determine whether observed frequencies are significantly different from expected frequencies.
What is Chi-Square?
This type of analysis has one dependent variable and multiple independent variable.
What is Multivariable analysis test?
Multivariate analysis has _____ ____________ variable and multiple __________ variable.
What is
a. Two dependent
b. independent
Calculate the degrees of freedom for each type of chi-square.
What is
Chi-square goodness-of-fit: df= category (c)-1
Chi-square homogeneity | Chi-square association/independence: df= (r-1)(c-1)
The best design for a homogeneous population is CRD over RBD.
What is TRUE?
Can be used to examine the effects of several independent variables on the value of the dependent variable. In addition, it controls for confounders.
What is Multiple regression model?
Define Chi-Square of association/independence.
What is an association between a row variable and a column variable?
Simple linear regression model is a linear relationship between _________ variable and the __________ variable.
What is
a. predictor
b. outcome
What is the equation for paired t-test?
What is to= (dbar)/(Sd/sqrt(n))?
The two disadvantages of CRD are that its usually suited for large experiments because experimental units must be uniform and the analysis does not distinguish between the treatment effects.
What is FALSE?
Can be used to divide subjects with similar characteristics into blocks, and then within each block, randomly assign subjects to treatment groups.
What is Randomized Block Design (RBD)?
Define Simple linear regression model.
What is a linear relationship between one predictor variable and the outcome variable?
Advantages of CRD:
(1) Complete flexibility is allowed.
(2)
(3) The method of analysis is easy.
(4)
What is
(2) The statistical analysis remains simple even though some experimental units may be lost during the study.
(4) The design maximizes the number of degrees of freedom for the error term.
What is the equation for unpaired t-test, assuming population mean is not zero?
What is to= ((x1-x2)-(u1-u2))/sqrt(s1/n1 + s2/n2) ?
Type 1 gives you a false positive. Type 2 gives you a false negative.
What is True?
Compares the means between more than two independent groups.
What is ANOVA?
Define Type 1 error and Type 2 error.
What is Type 1 occurs when we incorrectly reject the null hypothesis and Type 2 occurs when we incorrectly accept the null hypothesis or error that occurs when one fails to reject a null hypothesis that is actually false?
SEE BOARD FOR ANOVA TABLE
What is:
*Source of variation
*Within the group (Error)
*TrSS
*TSS
*ESS/n-k
*F-Value
*MSStr/MSSe
Break down the hypothesis test procedure in all the steps.
What is:
Step 1 - Formulate the null and alternative hypothesis.
Step 2 - Identify the appropriate test statistic
Step 3 - State the significance level
Step 4 - State the statistical decision rule
Step 5 - Construct the One-Way ANOVA Table
Step 6 - Make conclusions based on statistical analyses.